For those who want to have a more cinematic view of the game, this is for you. To do the glitch you just have to take out your ghost and, before it appears, sprint. This will make your weapon invisible. You can still shoot, throw grenades and melee, but you won't see your weapon. To get out of the glitch you gotta change weapons, sprint and change weapons again. This sometimes don't work, in those cases just go to orbit and when you go do an activity it should be fixed. Edit: This doesn't work 100% of the time, it only happened to me twice, but it does happen.